W/4 + 12.5 - 7z what term has a coefficient

Pls help me.

The value √10 and √15 are plotted on the number line

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

What is the value of x in the this question ?